If you go from: brunette to blond

MAKEUP FIX: Go for soft, muted colors such as pale pinks, mauvey browns, and nudes, and avoid playing up more than one feature at a time. If you're craving more drama, use a sparkly gray liner on your upper lid.

If you go from: brunette to reddish brown

SHADE SHIFT: Even if you keep your strand switch within a similar color family, you have to adjust your makeup — the undertones in your hair and cosmetic colors need to match.MAKEUP FIX: "Our eye is trained to interpret color harmony as beauty," says Surratt. So if you add, say, auburn highlights, you should ditch cool shades like bright blue and opt for warmer makeup hues such as tawny, champagne, and even a swipe of soft gray.